Paper-feeding mechanism for type-writers.



VICTOR-CHARLES DOLD PAPER FEEDING MECHANISM FOR TYPE WRITERS.

APFLICA'HON F|L[D JAN. i9, I914.

Patented Jan. 4, 1,916.

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VICTOR-CHARLES DOLD.

PAPER FEEDING MECHANISM FOR TYPE WRITERS.

APPLICATION FiLED IAN. I9 1914.

Patented J an. 4, 1916.

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K4 A. MA 0 VICTOR-CHARLES DOLD, or vaNv s @Wbn .IRANCE, ASSIGNOB T0 SQCIIETI'J LA STEN PHILE OF yams, FR ANGE.

APE-ILTEEBING. MECHANISM FOR-TYPE-WRITERS.

T 0 all zc'hont it may concern Be it known that. I, VICTOR-CHARLES Donn, a subject of the Grand Duke of Luxemburg, andresi'dent of Vanves, France, have invented new and useful Improvementsin Ra'per l eeding Mechanism for Stenographic 'l ype lyriters, which are fully set-forth in the following specification.

The present,invention has reference to paper-feeding ;mechanism for typewriters, and it proposes a certain hereinafter-described improvements in or relating to'the construction ,"andf'mounting of the roller whereon the paper i s' wound up as the operationof thefinstiunient continues, the im provements being especially designed .for incorporation in or lzipplieation to, the so-, called, stenographicii typewriters in which a contirua ous strip of paper is utilized. In the character of machine just specified, the paper feed is effected through the agency of gearing which is -itscl f actuated when the pressure exerted. upontlielkeys is removed, as is generally understood. At the beginning ofhthe operation-the paper has a uniforniivfeedaora in other words, is fed forward to,-t-he same extent each time that the atone-mentioned gearing is actuated. but as the operation proceeds. and the diameter of the \\:-ound-up,-r0ll jofpaper increases, this feed: varies and thepaces between successive lines of writingl iecoine proportiomitely gH-ater and greater. My invention has been designed with the object in view of avoiding such detect. and to this end it resides in the,"

provision of a pair of feeding rollers. one of which is positively driven. while the other is loosely mounted upon. its supporting shaft and s0 disposed as to press the paper against the first-named roller: the winding roller, which is driven from the aforesaid firstnamed roller. provided with a i'ieldingl mounted gear which is adapted to rotate independently of the winding roller. after the latter has wound up the quantity of paper fed thereto. leaving said winding roller to remain stationary until such rotation has been completed.

In the accompan ing drawing. an cml.)(lllll(llt of the invention has been repr sented as applied to thwell-known (forcignl tenophilelivort stcnographic typewriling machine. but (|l!\'l()ll. 'l no limitation to such specilic application is either contemplated or necessary. since the improveasbecificatiion of Letters Patent.

.Paten'ted'Jan. 4; 1916;

A 'neiu n an-awe 19, 1914. Serial No. 813,069.

ments constituting said invention may be applied to any otherstandard machine with equal facility. I

said drawing: Figure 1 is a diagrammatic vertical section; Fig. 2 is a plan view of Fig. 1; Fig. 3 is an enlarged fragmental section, illustrative of one form-of mountmg for the gear-0n the winding roller; Figs. 1 and 5, are views similar to F ig. 3, but showing alternative mountings; and Figs. 6 and T are views of details.

Referring more particularly to the drawing. 11 indicates-the roll of paper which is unwound during the operation of the machine. 1-2 a guide roller over which the paper passes on its way to the platen- 13, and 14; and 1 the rollers which feed the paper to the winding roller 16.

is hereinafter described in detaihmay be of the type ordinarily in use in the Stenoplnle- Bivort. machine, or of any other desired These parts, with the exception of the winding roller. which:

type, and. as previously stated. the lower roller 11 isdriven positively, through the agency of the mechanlsm or devices em loyed in the afore-mentioned machine. or in any other suitable manner. while the upper roller 15 is loose on its supporting shaft and serves to press the paper against the said roller 14.

The improved winding roller consists of a hollo cylindrical shell 2, which forms the body of the roller. and anaxial supporting shaft 1 whereon said shell is fixed. ends of the shaft 1 project beyond those of the roller. and upon one of them is loosely mounted a gear 1 which is driven from the feeding roller 14 by meansof an intermcdiate gear 1?. The gear 4 is forced against the adiacent end face of the Shell 2 by a lelle'ville spring washer (best shown in Fig.3). provided with a screw 5 which enahles its tension to be adjusted at will. but while this construction is preferred. the said washer 3 ma be replaced by either a helical spring (Fig. -ll. or a coil spring 10, (Fig. 3). In the former modification. the inner end of the spring (3 bears against the end wall of an adjustable cup 8, which is fitted in the shell end and serves to regulate the ttll.l(lll of the spring. and the outer end of said spring bears against gear 4 and forces it l ";llll. l the winding roller fast on shaft 1. while in the other modification the gear is formed with an inwardly-extending, axial The sleeve 9, through which the shaft end loosely passes, the inner end of spring 10 being secured to said sleeve and its outer end to the inner wall of shell 2. 1

Inieach of the forms, however, the operation is substantially the saine; that is to say each timethat roller 14' is rotated, the paper. strip which passes between it and the upper roller 15, is advanced to the predetermined extent irrespective of the diameter of the roll of paper wound upon the winding-roller at' such time. This is due to the fact .that the mounting of the gear 4 is of such" acharacter as to provide, in effect, for a differential movement of the winding roller, the extent-of movement depending upon the diameter of the roll of paper on the roller, so that where the paper fed to said roller is wound up thereon before the movement-of the gear 4 is completed, the roller will remain stationary during the surplus rotary movement of said gear.

In order to facilitate reading of the symhols printed upon the paper, means is preferably provided for printing a line upon the said paper simultaneously with the synr bols, thereby fixing the position of the latter relatively to such line. The means in question is here shown as consisting of a frame 18, (Figs. 1, 2 and 6), the sides of which are pivoted at 19 on suitable fixed bearings, the said frame having its front member 20 resting on the type bars and provided with the necessary type for printing the desired line. To take up the play of the keys, and thus cause the symbols to be printed on the same line, the device represented in Fig. 7 may be utilized, such device consisting, as therein shown, of a bar 21 which is secured to the framework of the machine, and through which passes, to the right of the key stems, a screw 22, or similar adjusting member. i

I claim 1. In a typewriting niachine the combination with mechanism for feeding a continuous strip of paper embodying a pair of superposed rollers between whlch the strip passes; of a winding device to which said therefor, and a spring-controlled gear mounted upon said shaft at one end of said shell; and a gear connection between said feeding mechanism and 'the first-named gear.

3. In a typewriting machine, the combination, with mechanism for feeding a continuous strip of paper; of a winding device to which the strip is fed comprising a differentially-movable roller, a supporting shaft therefor a gear loosely mounted upon said shaftat one end of said roller, and a spring washer engaging said gear to force the latter into frictional engagement with said roller end; and a gear connection between said feeding mechanism and the firstnamed gear.

4. In a typewriting machine, the combination. with mechanism for feeding a continuous strip of paper; of a winding device to which the strip'is fed comprising a differentially-movable roller, a supporting shaft therefor, a gear loosely mounted upon said shaft at one end of said roller, a Belleville washer engaging said gear for forcing the latter into frictional engagement with said roller end. and means for adjusting the pressure of said washer upon said gear; and a gear connection between said feeding mechanism and the first-named gear.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

VICTOR-CHARLES DOLD.

lVitnesses EMILE .Li-zonn'r, Haxsox C. COKE. 

